$763+ Cheap flights from Islip, NY (ISP) to London (LON)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LON
Sep 20 — Sep 271
Round-trip
1 adult, Economy
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Find cheap flights from Islip to London with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to London
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Cheapest flights from Islip to LondonExplore the most affordable flight options available from Islip to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
Explore the most affordable flight options available from Islip to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:02 pm -
2 stops37h 58m
Fri 10/92:00 pm -
1 stop32h 30m
Deal found 8/18![Multiple Airlines logo]()
$874
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:43 pm -
1 stop35h 17m
Sun 10/112:00 pm -
2 stops29h 22m
Deal found 8/20![Multiple Airlines logo]()
$892
This Norse deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:57 am -
1 stop18h 03m
Sun 8/302:00 pm -
1 stop24h 53m
Deal found 8/18![Multiple Airlines logo]()
$938
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:50 pm -
2 stops18h 05m
Tue 11/1012:15 pm -
2 stops14h 25m
Deal found 8/18![Multiple Airlines logo]()
$992
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:20 pm -
2 stops17h 20m
Wed 10/213:40 pm -
2 stops36h 55m
Deal found 8/20![Multiple Airlines logo]()
$993
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:50 pm -
2 stops18h 05m
Wed 10/219:25 pm -
2 stops31h 10m
Deal found 8/20![Multiple Airlines logo]()
$994
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:05 pm -
2 stops14h 50m
Tue 10/69:25 pm -
2 stops30h 10m
Deal found 8/17![Multiple Airlines logo]()
$1,000
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:20 pm -
2 stops24h 00m
Thu 9/179:25 pm -
2 stops29h 45m
Deal found 8/19![Multiple Airlines logo]()
$1,009
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
2 stops17h 20m
Wed 10/213:40 pm -
2 stops36h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,018
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:55 am -
2 stops22h 45m
Thu 9/173:40 pm -
2 stops35h 30m
Deal found 8/19![Multiple Airlines logo]()
$1,033
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1612:30 pm -
2 stops17h 20m
Thu 1/1412:15 pm -
2 stops14h 15m
Deal found 8/19![Multiple Airlines logo]()
$1,036
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:10 pm -
2 stops24h 10m
Fri 10/91:05 pm -
2 stops15h 30m
Deal found 8/18![Multiple Airlines logo]()
$1,042
Best flights from Islip to LondonDiscover carefully curated flight deals from Islip to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
Discover carefully curated flight deals from Islip to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
This Norse deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:43 pm -
1 stop35h 17m
Fri 10/92:00 pm -
1 stop32h 30m
Deal found 8/18![Multiple Airlines logo]()
$876
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:20 pm -
2 stops23h 00m
Tue 11/1012:15 pm -
2 stops14h 25m
Deal found 8/18![Multiple Airlines logo]()
$992
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
2 stops14h 35m
Wed 10/211:05 pm -
2 stops14h 30m
Deal found 8/18![Multiple Airlines logo]()
$992
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:20 pm -
2 stops17h 20m
Wed 10/213:40 pm -
2 stops36h 55m
Deal found 8/20![Multiple Airlines logo]()
$993
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:50 pm -
2 stops18h 05m
Mon 10/268:35 pm -
2 stops30h 00m
Deal found 8/20![Multiple Airlines logo]()
$994
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:50 pm -
2 stops18h 05m
Wed 10/219:25 pm -
2 stops31h 10m
Deal found 8/20![Multiple Airlines logo]()
$994
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:05 pm -
2 stops14h 50m
Tue 10/69:25 pm -
2 stops30h 10m
Deal found 8/17![Multiple Airlines logo]()
$1,000
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
2 stops17h 20m
Wed 10/213:40 pm -
2 stops36h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,018
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1612:30 pm -
2 stops17h 20m
Thu 1/1412:15 pm -
2 stops14h 15m
Deal found 8/19![Multiple Airlines logo]()
$1,036
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:10 pm -
2 stops24h 10m
Fri 10/91:05 pm -
2 stops15h 30m
Deal found 8/18![Multiple Airlines logo]()
$1,042
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:40 pm -
2 stops16h 00m
Thu 10/83:40 pm -
2 stops36h 55m
Deal found 8/17![Multiple Airlines logo]()
$1,127
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:55 am -
2 stops20h 00m
Wed 9/239:25 pm -
2 stops29h 45m
Deal found 8/17![Multiple Airlines logo]()
$1,129
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:35 pm -
2 stops18h 20m
Thu 9/249:25 pm -
2 stops29h 45m
Deal found 8/18![Multiple Airlines logo]()
$1,135
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:40 pm -
2 stops13h 15m
Thu 10/89:25 pm -
2 stops31h 10m
Deal found 8/17![Multiple Airlines logo]()
$1,166
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:25 pm -
2 stops17h 30m
Mon 11/1611:55 am -
2 stops14h 45m
Deal found 8/17![Multiple Airlines logo]()
$1,176
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:40 pm -
2 stops21h 40m
Fri 10/231:05 pm -
2 stops15h 30m
Deal found 8/17![Multiple Airlines logo]()
$1,207
This Icelandair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/284:55 pm -
2 stops21h 35m
Thu 1/78:35 pm -
2 stops29h 55m
Deal found 8/21![Multiple Airlines logo]()
$1,244
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:15 pm -
2 stops18h 20m
Sun 10/43:40 pm -
2 stops36h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,270
This Mytrip deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:05 am -
2 stops18h 20m
Sun 10/116:35 pm -
2 stops30h 40m
Deal found 8/20![Multiple Airlines logo]()
$1,389
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2110:20 am -
2 stops23h 20m
Thu 9/243:40 pm -
2 stops35h 30m
Deal found 8/19![Multiple Airlines logo]()
$1,458
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1712:25 pm -
2 stops17h 30m
Mon 12/2111:55 am -
2 stops16h 50m
Deal found 8/17![Multiple Airlines logo]()
$1,521
Last-minute flights from Islip to LondonDiscover last-minute flight deals from Islip to London. Data last updated August 21, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to London. Data last updated August 21, 2026 and is based on user searches.
This Norse deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:57 am -
1 stop18h 03m
Sun 8/302:00 pm -
1 stop24h 53m
Deal found 8/18![Multiple Airlines logo]()
$938
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:20 pm -
2 stops24h 00m
Thu 9/179:25 pm -
2 stops29h 45m
Deal found 8/19![Multiple Airlines logo]()
$1,009
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:55 am -
2 stops22h 45m
Thu 9/173:40 pm -
2 stops35h 30m
Deal found 8/19![Multiple Airlines logo]()
$1,033
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:55 am -
2 stops20h 00m
Wed 9/239:25 pm -
2 stops29h 45m
Deal found 8/17![Multiple Airlines logo]()
$1,129
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:35 pm -
2 stops18h 20m
Thu 9/249:25 pm -
2 stops29h 45m
Deal found 8/18![Multiple Airlines logo]()
$1,135
This Icelandair deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2012:45 pm -
2 stops26h 35m
Sun 9/279:25 pm -
2 stops29h 45m
Deal found 8/21![Multiple Airlines logo]()
$1,465
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2110:20 am -
2 stops29h 00m
Thu 9/241:05 pm -
2 stops14h 05m
Deal found 8/19![Multiple Airlines logo]()
$1,457
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2110:20 am -
2 stops23h 20m
Thu 9/243:40 pm -
2 stops35h 30m
Deal found 8/19![Multiple Airlines logo]()
$1,458
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:20 pm -
2 stops15h 35m
Sun 9/279:25 pm -
2 stops29h 45m
Deal found 8/19![Multiple Airlines logo]()
$1,389
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:15 pm -
2 stops18h 20m
Sun 10/43:40 pm -
2 stops36h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,270
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:55 am -
2 stops19h 00m
Sun 10/41:05 pm -
2 stops15h 30m
Deal found 8/18![Multiple Airlines logo]()
$1,324
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:05 pm -
2 stops14h 50m
Tue 10/69:25 pm -
2 stops30h 10m
Deal found 8/17![Multiple Airlines logo]()
$1,000
One-way flights from Islip to LondonSearch for one-way flight options from Islip to London. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
Search for one-way flight options from Islip to London. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:45 pm -
2 stops13h 05m
Deal found 8/17![Multiple Airlines logo]()
$763
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:00 am -
2 stops22h 40m
Deal found 8/17![Multiple Airlines logo]()
$763
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:55 pm -
2 stops18h 00m
Deal found 8/17![Multiple Airlines logo]()
$765
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:55 pm -
2 stops20h 45m
Deal found 8/17![Multiple Airlines logo]()
$765
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:55 pm -
2 stops26h 25m
Deal found 8/17![Multiple Airlines logo]()
$766
This Icelandair deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/144:05 pm -
2 stops17h 35m
Deal found 8/17![Multiple Airlines logo]()
$766
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/64:15 pm -
2 stops17h 25m
Deal found 8/18![Multiple Airlines logo]()
$770
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1812:35 pm -
2 stops26h 45m
Deal found 8/19![Multiple Airlines logo]()
$808
This Icelandair deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:20 am -
2 stops23h 20m
Deal found 8/19![Multiple Airlines logo]()
$808
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:00 am -
2 stops19h 55m
Deal found 8/20![Multiple Airlines logo]()
$813
This Icelandair deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:40 pm -
2 stops16h 00m
Deal found 8/20![Multiple Airlines logo]()
$813
This Icelandair deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:20 am -
2 stops29h 00m
Deal found 8/18![Multiple Airlines logo]()
$815
Find flight deals from Islip to London
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $874 (Kiwi.com) |
One-way from | $488 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $732 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 21, 2026.
Use the filters below to find and compare flights from Islip to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipLondon
ISP Islip Long Island - LGW London Gatwick
ISPLGW
Islip Long Island
Fri 10/2
5:43 pm-10:00 am
1 stop35h 17m
London Gatwick
Fri 10/9
2:00 pm-5:30 pm
1 stop32h 30m
$876
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Tue 10/13
4:20 pm-8:20 pm
2 stops23h 00m
London Heathrow
Tue 11/10
12:15 pm-9:40 pm
2 stops14h 25m
$992
Quickest round-trip
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Wed 10/14
4:20 pm-11:55 am
2 stops14h 35m
London Heathrow
Wed 10/21
1:05 pm-10:35 pm
2 stops14h 30m
$992
IslipLondon
ISP Islip Long Island - LGW London Gatwick
ISPLGW
Islip Long Island
Tue 10/13
4:20 pm-2:40 pm
2 stops17h 20m
London Gatwick
Wed 10/21
3:40 pm-11:35 pm
2 stops36h 55m
$993
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Wed 10/14
12:50 pm-11:55 am
2 stops18h 05m
London Heathrow
Mon 10/26
8:35 pm-10:35 pm
2 stops30h 00m
$994
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Tue 10/13
12:50 pm-11:55 am
2 stops18h 05m
London Heathrow
Wed 10/21
9:25 pm-11:35 pm
2 stops31h 10m
$994
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Mon 9/28
4:05 pm-11:55 am
2 stops14h 50m
London Heathrow
Tue 10/6
9:25 pm-10:35 pm
2 stops30h 10m
$1,000
IslipLondon
ISP Islip Long Island - LGW London Gatwick
ISPLGW
Islip Long Island
Wed 10/14
4:20 pm-2:40 pm
2 stops17h 20m
London Gatwick
Wed 10/21
3:40 pm-11:35 pm
2 stops36h 55m
$1,018
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Wed 12/16
12:30 pm-10:50 am
2 stops17h 20m
London Heathrow
Thu 1/14
12:15 pm-9:30 pm
2 stops14h 15m
$1,036
IslipLondon
ISP Islip Long Island - LHR London Heathrow
ISPLHR
Islip Long Island
Fri 10/2
3:10 pm-8:20 pm
2 stops24h 10m
London Heathrow
Fri 10/9
1:05 pm-11:35 pm
2 stops15h 30m
$1,042
Showing 1-10 of 38 resultsSorted by cheapest first
Compare providers for flights from Islip to London
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to London in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-London flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Islip to London
Have a flexible travel schedule? Discover the best time to fly to London from Islip with our price prediction graph.
ISP-LON
ISP-LHR
ISP-LGW
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Islip to London
ISP-LON
ISP-LHR
ISP-LGW
No data available for this route at this time. Please check back soon.
Related info for your journey
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Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsIlford
Dorking
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Southend-on-Sea
Watford
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Kingston upon Thames
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Slough
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Sutton
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Harlow
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